Extra Heavy Duty – Standard Inch Series

(White with Green Stripe)Efficient Operating Range is 15% to 25% deflection of free length. Maximum deflection is 25%; Long Life deflection is 20%; Optimum Life deflection is 15%. Deflection beyond this Efficient Operating Range could result in premature spring failure. Travel to Solid is a reference dimension only and should never be approached during use.

25% Deflection

20% Deflection

15% Deflection

Travel to Solid

Part#

Free
Length (In)

Free
Length (mm)

Load (lbs)

Deflection Length

Load (lbs)

Deflection Length

Load (lbs)

Deflection Length

Load (lbs)

Deflection Length

Load @
.1″ Deflection (lbs)

Hole Dia.

Rod Dia.

EH37-100

1

25.4

56

0.25

45

0.2

34

0.15

65

0.289

22.5

3/8

3/16

EH37-125

1.25

31.8

58

0.313

46

0.25

35

0.188

66

0.356

18.5

3/8

3/16

EH37-150

1.5

38.1

57

0.375

46

0.3

34

0.225

77

0.505

15.3

3/8

3/16

EH37-175

1.75

44.5

50

0.438

40

0.35

30

0.263

68

0.599

11.4

3/8

3/16

EH37-200

2

50.8

50

0.5

40

0.4

30

0.3

70

0.7

10

3/8

3/16

EH37-250

2.5

63.5

50

0.625

40

0.5

30

0.375

73

0.913

8

3/8

3/16

EH37-300

3

76.2

60

0.75

48

0.6

36

0.45

86

1.077

8

3/8

3/16

EH37-1200

12

304.8

60

3

48

2.4

36

1.8

92

4.585

2

3/8

3/16

EH50-100

1

25.4

91

0.25

73

0.2

55

0.15

135

0.371

36.5

1/2

9/32

EH50-125

1.25

31.8

94

0.313

75

0.25

56

0.188

132

0.439

30

1/2

9/32

EH50-150

1.5

38.1

93

0.375

74

0.3

56

0.225

117

0.471

24.8

1/2

9/32

EH50-175

1.75

44.5

97

0.438

77

0.35

58

0.263

144

0.651

22.1

1/2

9/32

EH50-200

2

50.8

95

0.5

76

0.4

57

0.3

142

0.747

19

1/2

9/32

EH50-250

2.5

63.5

90

0.625

72

0.5

54

0.375

132

0.916

14.4

1/2

9/32

EH50-300

3

76.2

84

0.75

67

0.6

50

0.45

123

1.094

11.2

1/2

9/32

EH50-350

3.5

88.9

83

0.875

67

0.7

50

0.525

115

1.211

9.5

1/2

9/32

EH50-1200

12

304.8

84

3

67

2.4

50

1.8

137

4.888

2.8

1/2

9/32

EH62-100

1

25.4

173

0.25

138

0.2

104

0.15

194

0.281

69

5/8

11/32

EH62-125

1.25

31.8

160

0.313

128

0.25

96

0.188

191

0.375

51

5/8

11/32

EH62-150

1.5

38.1

151

0.375

121

0.3

91

0.225

178

0.441

40.3

5/8

11/32

EH62-175

1.75

44.5

162

0.438

130

0.35

97

0.263

214

0.578

37

5/8

11/32

EH62-200

2

50.8

153

0.5

122

0.4

92

0.3

185

0.605

30.5

5/8

11/32

EH62-250

2.5

63.5

158

0.625

126

0.5

95

0.375

198

0.786

25.2

5/8

11/32

EH62-300

3

76.2

147

0.75

118

0.6

88

0.45

187

0.956

19.6

5/8

11/32

EH62-350

3.5

88.9

152

0.875

122

0.7

91

0.525

207

1.191

17.4

5/8

11/32

EH62-400

4

101.6

147

1

118

0.8

88

0.6

202

1.373

14.7

5/8

11/32

EH62-1200

12

304.8

150

3

120

2.4

90

1.8

219

4.388

5

5/8

11/32

EH75-100

1

25.4

363

0.25

290

0.2

218

0.15

381

0.263

145

3/4

3/8

EH75-125

1.25

31.8

398

0.313

318

0.25

239

0.188

433

0.341

127

3/4

3/8

EH75-150

1.5

38.1

324

0.375

260

0.3

195

0.225

403

0.466

86.5

3/4

3/8

EH75-175

1.75

44.5

369

0.438

295

0.35

221

0.263

482

0.573

84.2

3/4

3/8

EH75-200

2

50.8

362

0.5

289

0.4

217

0.3

483

0.668

72.3

3/4

3/8

EH75-250

2.5

63.5

316

0.625

253

0.5

190

0.375

430

0.85

50.6

3/4

3/8

EH75-300

3

76.2

311

0.75

249

0.6

187

0.45

421

1.014

41.5

3/4

3/8

EH75-350

3.5

88.9

332

0.875

265

0.7

199

0.525

439

1.158

37.9

3/4

3/8

EH75-400

4

101.6

300

1

240

0.8

180

0.6

420

1.399

30

3/4

3/8

EH75-450

4.5

114.3

341

1.125

273

0.9

205

0.675

485

1.602

30.3

3/4

3/8

EH75-500

5

127

344

1.25

275

1

206

0.75

474

1.722

27.5

3/4

3/8

EH75-550

5.5

139.7

303

1.375

242

1.1

182

0.825

435

1.976

22

3/4

3/8

EH75-600

6

152.4

332

1.5

265

1.2

199

0.9

467

2.111

22.1

3/4

3/8

EH75-1200

12

304.8

336

3

269

2.4

202

1.8

496

4.432

11.2

3/4

3/8

EH100-150

1.5

38.1

666

0.375

533

0.3

399

0.225

692

0.39

177.5

1

1/2

EH100-200

2

50.8

615

0.5

492

0.4

369

0.3

749

0.609

123

1

1/2

EH100-250

2.5

63.5

606

0.625

485

0.5

364

0.375

763

0.787

97

1

1/2

EH100-300

3

76.2

600

0.75

480

0.6

360

0.45

749

0.936

80

1

1/2

EH100-350

3.5

88.9

613

0.875

490

0.7

368

0.525

812

1.16

70

1

1/2

EH100-400

4

101.6

570

1

456

0.8

342

0.6

752

1.32

57

1

1/2

EH100-450

4.5

114.3

585

1.125

468

0.9

351

0.675

776

1.493

52

1

1/2

EH100-500

5

127

651

1.25

521

1

391

0.75

888

1.704

52.1

1

1/2

EH100-600

6

152.4

648

1.5

518

1.2

389

0.9

870

2.013

43.2

1

1/2

EH100-1200

12

304.8

642

3

514

2.4

385

1.8

934

4.366

21.4

1

1/2

EH125-200

2

50.8

975

0.5

780

0.4

585

0.3

1057

0.542

195

1-1/4

5/8

EH125-250

2.5

63.5

1058

0.625

846

0.5

635

0.375

1384

0.818

169.2

1-1/4

5/8

EH125-300

3

76.2

1027

0.75

821

0.6

616

0.45

1346

0.983

136.9

1-1/4

5/8

EH125-350

3.5

88.9

910

0.875

728

0.7

546

0.525

1194

1.148

104

1-1/4

5/8

EH125-400

4

101.6

875

1

700

0.8

525

0.6

1146

1.31

87.5

1-1/4

5/8

EH125-450

4.5

114.3

872

1.125

698

0.9

523

0.675

1181

1.524

77.5

1-1/4

5/8

EH125-500

5

127

881

1.25

705

1

529

0.75

1211

1.718

70.5

1-1/4

5/8

EH125-600

6

152.4

863

1.5

690

1.2

518

0.9

1195

2.078

57.5

1-1/4

5/8

EH125-800

8

203.2

986

2

789

1.6

592

1.2

1355

2.749

49.3

1-1/4

5/8

EH125-1000

10

254

948

2.5

758

2

569

1.5

1282

3.383

37.9

1-1/4

5/8

EH125-1200

12

304.8

825

3

660

2.4

495

1.8

1113

4.047

27.5

1-1/4

5/8

EH150-200

2

50.8

1416

0.4

1062

0.3

1558

0.44

354

1-1/2

3/4

EH150-250

2.5

63.5

1672

0.625

1338

0.5

1003

0.375

1693

0.633

267.5

1-1/2

3/4

EH150-300

3

76.2

1320

0.6

990

0.45

1617

0.735

220

1-1/2

3/4

EH150-350

3.5

88.9

1641

0.875

1313

0.7

984

0.525

1749

0.933

187.5

1-1/2

3/4

EH150-400

4

101.6

1650

1

1320

0.8

990

0.6

2041

1.237

165

1-1/2

3/4

EH150-450

4.5

114.3

1592

1.125

1274

0.9

955

0.675

1856

1.312

141.5

1-1/2

3/4

EH150-500

5

127

1625

1.25

1300

1

975

0.75

1968

1.514

130

1-1/2

3/4

EH150-600

6

152.4

1575

1.5

1260

1.2

945

0.9

1950

1.857

105

1-1/2

3/4

EH150-800

8

203.2

1740

2

1392

1.6

1044

1.2

2340

2.69

87

1-1/2

3/4

EH150-1000

10

254

1680

2.5

1344

2

1008

1.5

2332

3.47

67.2

1-1/2

3/4

EH150-1200

12

304.8

1560

3

1248

2.4

936

1.8

2215

4.26

52

1-1/2

3/4

EH200-250

2.5

63.5

1538

0.375

1968

0.48

410

2

1

EH200-300

3

76.2

1740

0.6

1305

0.45

1885

0.65

290

2

1

EH200-350

3.5

88.9

1925

0.7

1444

0.525

2200

0.8

275

2

1

EH200-400

4

101.6

2400

1

1920

0.8

1440

0.6

2424

1.01

240

2

1

EH200-450

4.5

114.3

2447

1.125

1958

0.9

1468

0.675

2675

1.23

217.5

2

1

EH200-500

5

127

2250

1.25

1800

1

1350

0.75

2538

1.41

180

2

1

EH200-600

6

152.4

2310

1.5

1848

1.2

1386

0.9

2726

1.77

154

2

1

EH200-800

8

203.2

2370

2

1896

1.6

1422

1.2

2939

2.48

118.5

2

1

EH200-1000

10

254

2200

2.5

1760

2

1320

1.5

2807

3.19

88

2

1

EH200-1200

12

304.8

2598

3

2078

2.4

1559

1.8

3377

3.9

86.6

2

1

The best products, coupled with practical, innovative thinking

Established in 1914, Peterson Spring is the largest privately held spring manufacturer in North America. Through designing, manufacturing and supplying springs, snap-rings, wire forms, clips, clamps, stampings, and a variety of sub-assemblies, Peterson Spring has expanded to 13 worldwide locations.